#include <am.h>
#include <klib-macros.h>

void __am_timer_init();

void __am_input_keybrd(AM_INPUT_KEYBRD_T *);
void __am_timer_uptime(AM_TIMER_UPTIME_T *);
void __am_timer_rtc(AM_TIMER_RTC_T *);
void __am_gpu_config(AM_GPU_CONFIG_T *);
void __am_gpu_status(AM_GPU_STATUS_T *);
void __am_gpu_fbdraw(AM_GPU_FBDRAW_T *);
void __am_gpu_memcpy(AM_GPU_MEMCPY_T *gpu_memcpy);

static void __am_timer_config(AM_TIMER_CONFIG_T *cfg) { cfg->present = true; cfg->has_rtc = true; }
static void __am_input_config(AM_INPUT_CONFIG_T *cfg) { cfg->present = true;  }
static void __am_uart_config(AM_UART_CONFIG_T *cfg)   { cfg->present = false; }
 
typedef void (*handler_t)(void *buf);
static void *lut[128] = {
    [AM_TIMER_CONFIG] = __am_timer_config,
    [AM_TIMER_RTC   ] = __am_timer_rtc,
    [AM_TIMER_UPTIME] = __am_timer_uptime,
    [AM_INPUT_CONFIG] = __am_input_config,
    [AM_INPUT_KEYBRD] = __am_input_keybrd,
    [AM_UART_CONFIG ] = __am_uart_config,
    [AM_GPU_CONFIG  ] = __am_gpu_config,
    [AM_GPU_FBDRAW  ] = __am_gpu_fbdraw,
    [AM_GPU_STATUS  ] = __am_gpu_status,
    [AM_GPU_MEMCPY  ] = __am_gpu_memcpy,
};

static void fail(void *buf) { panic("access nonexist register"); }

bool ioe_init() {
    for (int i = 0; i < LENGTH(lut); i++)
        if (!lut[i]) lut[i] = fail;
    __am_timer_init();
    return true;
}

void ioe_read (int reg, void *buf) { ((handler_t)lut[reg])(buf); }
void ioe_write(int reg, void *buf) { ((handler_t)lut[reg])(buf); }
